Byebug is a Ruby debugger. It's implemented using the TracePoint C API for execution control and the Debug Inspector C API for call stack navigation. The core component provides support that front-ends can build on. It provides breakpoint handling and bindings for stack frames among other things and it comes with an easy to use command line interface.

A NeoVim-compatible text editor written in pure Ruby on top of Reline.

Spurline is to AI agents what Rails is to web applications — opinionated, convention-driven, and designed so that the right thing is the easy thing.

SwarmCLI provides a command-line interface for SwarmSDK, the lightweight multi-agent AI orchestration framework. Built with the TTY toolkit, it offers an intuitive and interactive way to define, manage, and execute AI agent swarms with progress indicators, formatted output, and comprehensive help documentation.

tempest is a REPL-style terminal client for Bluesky built on AT Protocol and Ruby 4.0.

A gem that automatically converts Thor command-line applications into interactive REPLs, maintaining state between commands and providing auto-completion for commands and parameters.

A client for using the UrlCategorise API in Ruby. Built from their api documentation. This is an unofficial project.

Yorishiro is a CLI-based LLM agent that supports multiple providers (Anthropic, OpenAI, Ollama), built-in tools for file operations and command execution, MCP server integration, and plan mode.